Thermodynamic Properties of Dense Plasma of Shock-Compressed Metals

Quasi-chemical representation (“Chemical Model”) was extrapolated for description of thermodynamic prop erties of plasma of shodc compressed extra-foam nickel and iron samples. Modified Coulomb correction [High Temperature, 18 (1980) 4471, was generalised for the case of multiply ionised partially degenerated hot dense plasmas. Intensive short-range repulsion of heavy particles (atoms and ions) and electron degeneracy was taken into account in combination with simplified form of “Cold Additive”. Satisfactory agreement of theory and experiment was obtained for nickel and iron Hugoniots. This agreement proved to be valid when the approximation was extrapolated into the region of extra-dense plasma of highly compressed solid iron